dissembling

NOUN
11 LETTERS · STARTS WITH D

dissembling is a valid 11-letter word worth 17 points in Scrabble and 22 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
D2I1S1S1E1M3B3L1I1N1G2
2 + 1 + 1 + 1 + 1 + 3 + 3 + 1 + 1 + 1 + 2 =17 PTS
DOUBLE WORD → 34TRIPLE WORD → 51
MEANING

What does dissembling mean?